Lattices of alternating layers of monocrystalline silicon and porous silicon-germanium have been produced. These single crystal lattices have been fabricated by epitaxial growth of Si and Si--Ge layers followed by patterning into mesa structures. The mesa structures are stain etched resulting in porosification of the Si--Ge layers with a minor amount of porosification of the monocrystalline Si layers. Thicker Si--Ge layers produced in a similar manner emitted visible light at room temperature.

Topics: NASA Technical Reports Server (NTRS), GERMANIUM, POROUS SILICON, CRYSTAL LATTICES, SINGLE CRYSTALS,...

An insect abatement system prevents adhesion of insect debris to surfaces which must be kept substantially free of insect debris. An article is coated with an insect abatement coating comprising polyorganosiloxane with a Shore A hardness of less than 50 and a tensile strength of less than 4 MPa. A method for preventing the adhesion of insect debris to surfaces includes the step of applying an insect abatement coating to a surface which must be kept substantially free of insect debris.

Topics: NASA Technical Reports Server (NTRS), ADHESION, DEBRIS, INSECTS, PATENTS, Spiro, Clifford Lawrence...

A pre-coding method and device for improving data compression performance by removing correlation between a first original data set and a second original data set, each having M members, respectively. The pre-coding method produces a compression-efficiency-enhancing double-difference data set. The method and device produce a double-difference data set, i.e., an adjacent-delta calculation performed on a cross-delta data set or a cross-delta calculation performed on two adjacent-delta data sets,...

Topics: NASA Technical Reports Server (NTRS), CODERS, CODING, DATA COMPRESSION, DATA CORRELATION, DECODING,...

A system is provided for operating a solid oxide fuel cell generator on diesel fuel. The system includes a hydrodesulfurizer which reduces the sulfur content of commercial and military grade diesel fuel to an acceptable level. Hydrogen which has been previously separated from the process stream is mixed with diesel fuel at low pressure. The diesel/hydrogen mixture is then pressurized and introduced into the hydrodesulfurizer. The hydrodesulfurizer comprises a metal oxide such as ZnO which...

Topics: NASA Technical Reports Server (NTRS), DIESEL FUELS, FUEL SYSTEMS, SOLID OXIDE FUEL CELLS, PATENTS,...

Contract efforts are focused on refining the Robust Design Methodology for Conceptual Aircraft Design. Robust Design Simulation (RDS) was developed earlier as a potential solution to the need to do rapid trade-offs while accounting for risk, conflict, and uncertainty. The core of the simulation revolved around Response Surface Equations as approximations of bounded design spaces. An ongoing investigation is concerned with the advantages of using Neural Networks in conceptual design. Thought was...

Topics: NASA Technical Reports Server (NTRS), AIRCRAFT DESIGN, PROCEDURES, MULTIVARIATE STATISTICAL...

The present invention is a laser heterodyne frequency generator system with a stabilizer for use in the microwave and millimeter-wave frequency ranges utilizing a photonic mixer as a photonic phase detector in a stable optical fiber delay-line. Phase and frequency fluctuations of the heterodyne laser signal generators are stabilized at microwave and millimeter wave frequencies by a delay line system operating as a frequency discriminator. The present invention is free from amplifier and mixer...

Topics: NASA Technical Reports Server (NTRS), DELAY LINES, FIBER OPTICS, FREQUENCY RANGES, OPTICAL...

Verification and Validation (V&V) is currently performed during application development for many systems, especially safety-critical and mission- critical systems. The V&V process is intended to discover errors, especially errors related to critical processing, as early as possible during the development process. The system application provides the context under which the software artifacts are validated. This paper describes a framework that extends V&V from an individual...

Topics: NASA Technical Reports Server (NTRS), SOFTWARE ENGINEERING, PROGRAMMING ENVIRONMENTS, COMPUTER...

4
4.0

Nov 15, 2018
11/18

by
Gregg Allman

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Tracklist: 1. Whippin' Post 2. House of Blues 3. Come Back and Help Me 4. Silence Ain't Golden Anymore 5. Rendevous With the Blues 6. Wolf's A' Howlin' 7. Love the Poison 8. Don't Deny Me 9. Dark End of the Street 10. Neighbor, Neighbor 11. I've Got News for You 12. Memphis in the Meantime 13. Startin' Over

Source: CD

Other Minds Music Reference Library

2
2.0

Aug 14, 2019
08/19

by
Cecilia Bartoli; Andrea Bocelli; Coro; Orchestra dell’Accademia Nazionale di Santa Cecilia; Myung-Whun Chung; Antonio Vivaldi; Charles‐François Gounod; César Franck; Franz Liszt; Gabriel Fauré; Georg Friedrich Händel; Georges Bizet; Gioachino Rossini; Giuseppe Verdi; Johann Sebastian Bach; John Paul II; Olivier Messiaen; Wolfgang Amadeus Mozart

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Tracklist: 1. Gloria In Excelsis Deo (Gloria) - Antonio Vivaldi 2. Domine Deus, Rex Caelestis (Gloria) - Antonio Vivaldi 3. Jesus Bleibet Meine Freude (Jesu, Joy Of Man's Desiring) - Johann Sebastian Bach 4. Hallelujah Chorus (Messiah) - Georg Friedrich Händel 5. Ave Verum Corpus - Wolfgang Amadeus Mozart 6. Alleluia (Exsultate, Jubilate) - Wolfgang Amadeus Mozart 7. Ave Verum Corpus - Franz Liszt 8. Qui Seminant In Lacrimis - Franz Liszt 9. Sanctus (Requiem) - Giuseppe Verdi 10. Amen (Stabat...

Source: CD

35
35

Dec 27, 2017
12/17

by
Einstürzende Neubauten

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Tracklist: 1. Fleisch "Blut Haut" Knochen 2. Sehnsucht (nie mehr) 3. Womb 4. Krach der schlagenden Herzen 5. Armenisch Bitter 6. Zum Tier machen 7. Sehnsucht (still stehend) 8. Durstige Tiere

Source: CD

118
118

Nov 29, 2017
11/17

by
Timbaland & Magoo; Aaliyah; Ginuwine; Playa

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Tracklist: 1. Beep Beep 2. Feel It 3. Up Jumps da’ Boogie 4. Clock Strikes 5. 15 After da’ Hour 6. Ms. Parker 7. Luv 2 Luv U (remix) 8. Luv 2 Luv U 9. Smoke in da’ Air 10. Intro Buddha 11. Peepin’ My Style 12. Writtin’ Rhymes 13. Deep in Your Memory 14. Clock Strikes (remix) 15. Sex Beat (interlude) 16. Man Undercover - Timbaland & Magoo; Aaliyah 17. Joy - Timbaland & Magoo; Ginuwine; Playa 18. Up Jumps da’ Boogie (remix)

Source: CD

11
11

Aug 6, 2018
08/18

by
Astor Piazzolla

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Tracklist: 1. Verano Porteño 2. Los Poseídos 3. Milonga del Angel 4. Muerte del Angel 5. Adiós Nonino 6. Otoño Porteño 7. Retrato de Milton

Source: CD

18
18

Sep 11, 2018
09/18

by
Timbaland & Magoo; Aaliyah; Ginuwine; Playa

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Tracklist: 1. Beep Beep 2. Feel It 3. Up Jumps da’ Boogie 4. Clock Strikes 5. 15 After da’ Hour 6. Ms. Parker 7. Luv 2 Luv U (remix) 8. Luv 2 Luv U 9. Smoke in da’ Air 10. Intro Buddha 11. Peepin’ My Style 12. Writtin’ Rhymes 13. Deep in Your Memory 14. Clock Strikes (remix) 15. Sex Beat (interlude) 16. Man Undercover - Timbaland & Magoo; Aaliyah 17. Joy - Timbaland & Magoo; Ginuwine; Playa 18. Up Jumps da’ Boogie (remix)

Source: CD

43
43

Nov 22, 2017
11/17

by
Pink Martini

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Tracklist: 1. Amado mío 2. No hay problema 3. Sympathique 4. Que será, será 5. La soledad 6. ¿Dónde estás, Yolanda? 7. Andalucía 8. Song of the Black Lizard 9. Bolero 10. Never on Sunday 11. Brazil 12. Lullaby

Source: CD

14
14

May 17, 2018
05/18

by
Harry Connick, Jr.

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Tracklist: 1. Let Me Love Tonight 2. To See You 3. Let's Just Kiss 4. Heart Beyond Repair 5. Once 6. Learn to Love 7. Love Me Some You 8. Much Love 9. In Love Again 10. Loved By Me

Source: CD

103
103

Dec 27, 2017
12/17

by
Timbaland & Magoo; Aaliyah; Ginuwine; Playa

audio

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Tracklist: 1. Beep Beep 2. Feel It 3. Up Jumps da’ Boogie 4. Clock Strikes 5. 15 After da’ Hour 6. Ms. Parker 7. Luv 2 Luv U (remix) 8. Luv 2 Luv U 9. Smoke in da’ Air 10. Intro Buddha 11. Peepin’ My Style 12. Writtin’ Rhymes 13. Deep in Your Memory 14. Clock Strikes (remix) 15. Sex Beat (interlude) 16. Man Undercover - Timbaland & Magoo; Aaliyah 17. Joy - Timbaland & Magoo; Ginuwine; Playa 18. Up Jumps da’ Boogie (remix)

Source: CD

248
248

Dec 27, 2017
12/17

by
Mystikal; B-Legit; E-40; Fiend; Mac; Master P; Mia X; O’Dell; Silkk the Shocker; Snoop Doggy Dogg

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Tracklist: 1. Born 2 Be a Soldier - Mystikal; Fiend; Mac; Master P; Silkk the Shocker 2. Murder 2 3. 13 Years 4. Unpredictable 5. Ain't No Limit - Mystikal; Silkk the Shocker 6. Ghetto Child 7. Did I Do It 8. Here We Go - Mystikal; B-Legit; E-40 9. We Got the Clout - Mystikal; Mia X 10. Still Smokin' 11. U Can't Handle This 12. The Man Right Chea 13. Dick on the Track 14. Sleepin' With Me - Mystikal; O’Dell 15. It Yearns 16. Gangstas - Mystikal; Master P; Snoop Doggy Dogg 17. Shine

Source: CD

12
12

Nov 27, 2017
11/17

by
Alto Reed

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Tracklist: 1. Cool Breeze 2. Missing You 3. Brasilia 4. Good Love 5. Every Single Time 6. Time To Stop Shopping Around 7. Change The World 8. Sahara 9. Eternal Love

Source: CD

103
103

Dec 21, 2017
12/17

by
Led Zeppelin

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Tracklist: Disc 1: 1. You Shook Me 2. I Can't Quit You Baby 3. Communication Breakdown 4. Dazed and Confused 5. The Girl I Love She Got Long Black Wavy Hair 6. What Is and What Should Never Be 7. Communication Breakdown 8. Travelling Riverside Blues 9. Whole Lotta Love 10. Somethin' Else 11. Communication Breakdown 12. I Can't Quit You Baby 13. You Shook Me 14. How Many More Times Disc 2: 1. Immigrant Song 2. Heartbreaker 3. Since I’ve Been Loving You 4. Black Dog 5. Dazed and Confused 6....

Source: CD

8
8.0

Aug 27, 2018
08/18

by
AFI

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Tracklist: 1. Keeping Out of Direct Sunlight (An Introduction) 2. Three Reasons 3. A Single Second 4. pH Low 5. Let It Be Broke 6. Third Season 7. Lower Your Head and Take It in the Body 8. Coin Return 9. The New Patron Saints and Angels 10. Three Seconds Notice 11. Salt for Your Wounds 12. Today’s Lesson 13. The Devil Loves You 14. Triple Zero

Source: CD

211
211

Dec 27, 2017
12/17

by
Luniz; 2 Live Crew; 3x Krazy; B-Legit; Brownstone; Christion; E-40; Eightball & MJG; Harm; Raphael Saadic; Redman; Swoop G.; Too Short

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Tracklist: 1. Intro 2. Highest Niggaz In The Industry (Feat. E-40 & B-Legit) - Luniz; E-40; B-Legit 3. Funkin Over Nuthin' (Feat. Too $hort & Harm) - Luniz; Too Short; Harm 4. In My Nature (Feat. Eightball & MJG) - Luniz; Eightball & MJG 5. Jus Mee & U (Feat. Raphael Saadiq) - Luniz; Raphael Saadic 6. Game 7. My Baby Mamma 8. Is It Kool 9. Sad Millionaire (Feat. Brownstone) - Luniz; Brownstone 10. Killaz on the Payroll 11. Phillies 12. Mobb Sh.. - Luniz; Swoop G.; 3x Krazy...

Source: CD

95
95

Dec 28, 2017
12/17

by
Bush

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Tracklist: 1. Everything Zen (The Lhasa Fever mix) 2. Mouth (The Stingray mix) 3. Swallowed (Goldie/Toasted Both Sides Please mix) 4. Synapse (Philip Steir/My Ghost in the Bush of Life mix) 5. History (Dub Pistols mix) 6. Personal Holloway (Fabio Paras/Soundclash Republic mix) 7. Bonedriven (Mekon/Beat Me Clever mix) 8. Insect Kin (Jack Dangers/Drum and Bees mix) 9. Comedown (Lunatic Calm mix) 10. Everything Zen (Derek DeLarge mix) 11. In a Lonely Place (Tricky mix)

Source: CD

20
20

Sep 21, 2013
09/13

by
W. -D. Nowak; O. Teryaev; A. Tkabladze

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We discuss the double spin asymmetries in charmonium hadroproduction with nonzero transverse momenta at fixed target energies, $\sqrt{s}\simeq40$ GeV, within the framework of the factorization approach. It is shown that the color octet contribution is dominant in the asymmetries. The size of the asymmetries and the projected statistical errors in a future option of HERA with longitudinally polarized protons scattering off a polarized target (HERA-$\vec N$) should allow to distinguish between...

Source: http://arxiv.org/abs/hep-ph/9711290v1

35
35

Sep 21, 2013
09/13

by
Somendra M. Bhattacharjee; Thomas Nattermann; Christopher Ronnewinkel

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Phases and phase transitions in pure and doped spin-Peierls system CuGeO_3 are considered on the basis of a Landau-theory. In particular we discuss the critical behaviour, the soliton width and the low temperature specific heat of the incommensurate phase. We show, that dilution leads always to the destruction of long range order in this phase, which is replaced by an algebraic decay of correlations if the disorder is weak.

Source: http://arxiv.org/abs/cond-mat/9711094v1

28
28

Sep 21, 2013
09/13

by
G. Dahmen; S. Huettemeister; T. L. Wilson; R. Mauersberger

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The large scale structure and physics of molecular gas in the Galactic center region is discussed based on the analysis of a 9' resolution survey of the Galactic center region in the J=1->0 line of C^18O. Emphasis is placed on the comparison with ^12CO(1--0) data. The line shapes of C^18O(1--0) and ^12CO(1--0) differ significantly. The ratio of the intensities of the two isotopomers in the Galactic center region is generally higher than the value of ~15 expected from the ``Standard...

Source: http://arxiv.org/abs/astro-ph/9711117v1

46
46

Sep 21, 2013
09/13

by
K. Ziegler

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The mechanism of delocalization of two-dimensional Dirac fermions with random mass is investigated, using a superfield representation. Although localization effects are very strong, one fermion component can delocalize due to the spontaneous breaking of a special supersymmetry of the model. The delocalized fermion has a non-singular density of states and is decribed by a diffusion propagator. Supersymmetry is restored if the mean of the random mass is sufficiently large. This is accompanied by...

Source: http://arxiv.org/abs/cond-mat/9711097v1

32
32

Sep 21, 2013
09/13

by
Robert H. Brandenberger

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The hypothesis that the Universe underwent a period of exponential expansion at very early times has become the most popular theory of the early Universe. Not only does it solve some of the problems of standard big bang cosmology, but it also provides a causal theory for the origin of primordial density fluctuations which may explain the observed density inhomogeneities and cosmic microwave fluctuations in the Universe. In these lectures, a review of the basic principles of inflationary...

Source: http://arxiv.org/abs/astro-ph/9711106v1

27
27

Sep 21, 2013
09/13

by
Misha Verbitsky

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Let X be a hyperkaehler manifold. Trianalytic subvarieties of X are subvarieties which are complex analytic with respect to all complex structures induced by the hyperkaehler structure. Given a K3 surface M, the Hilbert scheme classifying zero-dimensional subschemes of M admits a hyperkaehler structure. We show that for M generic, there are no trianalytic subvarieties of the Hilbert scheme. This implies that a generic deformation of the Hilbert scheme of K3 has no complex subvarieties.

Source: http://arxiv.org/abs/alg-geom/9705004v2

23
23

Sep 19, 2013
09/13

by
Naoya Takahashi; Tsutomu Kambe; Tohru Nakano; Toshiyuki Gotoh; Kiyoshi Yamamoto

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Two conditional averages for the increment Delta(x,x+r) = T(x)-T(x+r) of the scalar field are estimated for DNS data: H(Delta)= and G(Delta)= . The probability density function P(Delta) for Delta(x,x+r) is also calculated. If Delta, P(Delta), H(Delta), and G(Delta) are expressed as theta, P(theta), h(theta), and g(theta) in a dimensionless form, the data analysis has revealed interesting simple relationships between them. These relations may be helpful to construct a turbulence model.

Source: http://arxiv.org/abs/chao-dyn/9709019v4

48
48

Sep 21, 2013
09/13

by
Lothar Goettsche

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I give a conjectural generating function for the numbers of $\delta$-nodal curves in a linear system of dimension $\delta$ on an algebraic surface. It reproduces the results of Vainsencher for the case $\delta\le 6$ and Kleiman-Piene for the case $\delta\le 8$. The numbers of curves are expressed in terms of five universal power series, three of which I give explicitly as quasimodular forms. This gives in particular the numbers of curves of arbitrary genus on a K3 surface and an abelian surface...

Source: http://arxiv.org/abs/alg-geom/9711012v1

23
23

Sep 21, 2013
09/13

by
Adam Parusinski

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We show that every $\mu$-constant family of isolated hypersurface singularities of type f(x) + tg(x), where t is a parameter, is topologically trivial. In the proof we construct explicitely a vector field trivializing the family. The proof uses only the curve selection lemma and hence, for an appropriately translated statement, also works over the reals. Some applications to the study of singularities at infinity of complex polynomials are given.

Source: http://arxiv.org/abs/alg-geom/9711014v1

25
25

Sep 21, 2013
09/13

by
A. O. Barvinsky; C. Kiefer

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We present a systematic expansion of all constraint equations in canonical quantum gravity up to the order of the inverse Planck mass squared. It is demonstrated that this method generates the conventional Feynman diagrammatic technique involving graviton loops and vertices. It also reveals explicitly the back reaction effects of quantized matter and graviton vacuum polarization. This provides an explicit correspondence between the frameworks of canonical and covariant quantum gravity in the...

Source: http://arxiv.org/abs/gr-qc/9711037v1

58
58

Sep 21, 2013
09/13

by
Edmund Grimley-Evans

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Although adequate models of human language for syntactic analysis and semantic interpretation are of at least context-free complexity, for applications such as speech processing in which speed is important finite-state models are often preferred. These requirements may be reconciled by using the more complex grammar to automatically derive a finite-state approximation which can then be used as a filter to guide speech recognition or to reject many hypotheses at an early stage of processing. A...

Source: http://arxiv.org/abs/cmp-lg/9711002v1

34
34

Sep 21, 2013
09/13

by
Fabio Riccioni; Augusto Sagnotti

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We review some results on the complete coupling between tensor and vector multiplets in six-dimensional $(1,0)$ supergravity.

Source: http://arxiv.org/abs/hep-th/9711077v1

27
27

Sep 21, 2013
09/13

by
Natan Andrei; Gergely T. Zimanyi; Gerd Schoen

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We study two quantum dots in the limit of strong dot-lead coupling and weak dot-dot tunneling. The model maps on Ising-coupled Kondo impurities. We argue that a new quantum critical fixed point exists at an intermediate value of the mutual capacitance, supporting non-Fermi liquid behaviour. We construct the total conductance across the double dot structure. It exhibits a strongly peaked behaviour as a function of the mutual capacitance, gate voltage, and temperature.

Source: http://arxiv.org/abs/cond-mat/9711098v1

31
31

Sep 21, 2013
09/13

by
W. Collmar; V. Schoenfelder; H. Bloemen; J. J. Blom; W. Hermsen; M. McConnell; J. G. Stacy; K. Bennett; O. R. Williams

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The EGRET experiment aboard the Compton Gamma-Ray Observatory (CGRO) has observed at energies above 100 MeV strong gamma-ray flares with short-term time variability from the gamma-ray blazars 3C 279 and PKS 1622-297. During these flaring periods both blazars have been detected by the COMPTEL experiment aboard CGRO at photon energies of about 10 MeV, revealing simultaneous gamma-ray activity down to these energies. For both cases the derived fluxes exceed those measured in previous observations,...

Source: http://arxiv.org/abs/astro-ph/9711111v1

44
44

Sep 21, 2013
09/13

by
E. Oset; A. Ramos

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The s-wave meson-nucleon interaction in the $S = -1$ sector is studied by means of coupled-channel Lippmann Schwinger equations, using the lowest order chiral Lagrangian and a cut off to regularize the loop integrals. The method reproduces succesfully the $\Lambda (1405)$ resonance and the $K^- p \to K^- p, \bar{K}^0 n, \pi^0 \Lambda, \pi^0 \Sigma, \pi^+ \Sigma^-, \pi^- \Sigma^+$ cross sections at low energies. The inclusion of the $\eta \Lambda, \eta \Sigma^0$ channels in the coupled system is...

Source: http://arxiv.org/abs/nucl-th/9711022v1

21
21

Sep 21, 2013
09/13

by
A. Pineda; F. J. Yndurain

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We include two loop, relativistic one loop and second order relativistic tree level corrections, plus leading nonperturbative contributions, to obtain a calculation of the lower states in the heavy quarkonium spectrum correct up to, and including, $O(\alpha_s^4)$ and leading $\Lambda^4/m^4$ terms. This allows us, in particular, to obtain a model independent determination of the pole masses of the $b, c$ quarks, $$m_b=5 015^{+110}_{-70} mev; m_c=1 884^{+222}_{-133} mev$$ to which correspond the...

Source: http://arxiv.org/abs/hep-ph/9711287v1

37
37

Sep 21, 2013
09/13

by
Chandan Dasgupta; Oriol T. Valls

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Transitions between ``glassy'' local minima of a model free-energy functional for a dense hard-sphere system are studied numerically using a ``microcanonical'' Monte Carlo method that enables us to obtain the transition probability as a function of the free energy and the Monte Carlo ``time''. The growth of the height of the effective free energy barrier with density is found to be consistent with a Vogel-Fulcher law. The dependence of the transition probability on time indicates that this...

Source: http://arxiv.org/abs/cond-mat/9711095v1

28
28

Sep 21, 2013
09/13

by
Michael Farber; Gabriel Katz; Jerome Levine

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We consider the problem of whether it is possible to improve the Novikov inequalities for closed 1-forms, or any other inequalities of a similar nature, if we assume, additionally, that the given 1-form is harmonic with respect to some Riemannian metric. We show that, under suitable assumptions, it is impossible. We use, in an essential way, a theorem of E.Calabi characterizing 1-forms which are harmonic with respect to some metric. We also study some interesting examples illustrating our...

Source: http://arxiv.org/abs/dg-ga/9711007v1

29
29

Sep 21, 2013
09/13

by
Nicola Masetti; Massimo Della Valle

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We have performed a Discrete Fourier Transform on 136 CCD B, V and R frames of the Z Cam-type dwarf nova V1101 Aql. Our analysis indicates as possible orbital period P_orb =3.46 hours, though we cannot exclude the alias at 4.00 hours. We estimate the distance to the system to be about 300 pc. We possibly discovered a bright bow-shaped nebulosity around the object.

Source: http://arxiv.org/abs/astro-ph/9711115v1

29
29

Sep 21, 2013
09/13

by
U. Kraemmer; A. Rebhan

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In two recent preprints (hep-th/9710131 and hep-th/9710132), Abe and Nakanishi have claimed that the proof of the gauge independence of the conformal anomaly of the bosonic string as given by us in 1988 was wrong. A similar allegation has been made concerning our proof of the gauge independence of the sum of the ghost number and Lagrange multiplier anomalies in non-conformal gauges. In this short note we refute their criticism by explaining the simple logic of our proofs and emphasizing the...

Source: http://arxiv.org/abs/hep-th/9711075v1

29
29

Sep 21, 2013
09/13

by
E. Fradkin; Chetan Nayak; A. Tsvelik; Frank Wilczek

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We present a low-energy effective field theory describing the universality class of the Pfaffian quantum Hall state. To arrive at this theory, we observe that the edge theory of the Pfaffian state of bosons at $\nu=1$ is an $SU(2)_2$ Kac-Moody algebra. It follows that the corresponding bulk effective field theory is an SU(2) Chern-Simons theory with coupling constant $k=2$. The effective field theories for other Pfaffian states, such as the fermionic one at $\nu=1/2$ are obtained by a...

Source: http://arxiv.org/abs/cond-mat/9711087v1

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39

Sep 21, 2013
09/13

by
H. Aubin; K. Behnia; S. Ooi; T. Tamegai

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We studied the thermal conductivity of a Bi_2Sr_2CaCu_2O_8 single crystal as a function of a magnetic field ramped up and down and then reversed. As recently discovered by Krishana et al., we observed a field-independent thermal conductivity above a threshold field. However, our measurements show that the magnitude of background thermal conductivity depends on the field profile in the sample. This is incompatible with the interpretation put forward by Krishana and co-workers.

Source: http://arxiv.org/abs/cond-mat/9711093v1

23
23

Sep 21, 2013
09/13

by
Lars Brink; Alexander Turbiner; Niclas Wyllard

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We propose to parametrize the configuration space of one-dimensional quantum systems of N identical particles by the elementary symmetric polynomials of bosonic and fermionic coordinates. It is shown that in this parametrization the Hamiltonians of the A_N, BC_N, B_N, C_N and D_N Calogero and Sutherland models, as well as their supersymmetric generalizations, can be expressed -- for arbitrary values of the coupling constants -- as quadratic polynomials in the generators of a Borel subalgebra of...

Source: http://arxiv.org/abs/hep-th/9705219v2

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Sep 21, 2013
09/13

by
Karol Zyczkowski; Wojciech Slomczynski

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We define a metric in the space of quantum states taking the Monge distance between corresponding Husimi distributions (Q--functions). This quantity fulfills the axioms of a metric and satisfies the following semiclassical property: the distance between two coherent states is equal to the Euclidean distance between corresponding points in the classical phase space. We compute analytically distances between certain states (coherent, squeezed, Fock and thermal) and discuss a scheme for numerical...

Source: http://arxiv.org/abs/quant-ph/9711011v1

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Sep 21, 2013
09/13

by
Mans Henningson

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I review my work together with Piljin Yi on the spectrum of BPS-saturated states in N = 2 supersymmetric Yang-Mills theories. In an M-theory description, such states are realized as certain two-brane configurations. We first show how the central charge of the N = 2 algebra arises from the two-form central charge of the eleven-dimensional supersymmetry algebra, and derive the condition for a two-brane configuration to be BPS-saturated. We then discuss how the topology of the two-brane determines...

Source: http://arxiv.org/abs/hep-th/9711076v1

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Sep 21, 2013
09/13

by
J. Fujimoto; K. Hikasa; T. Ishikawa; M. Jimbo; T. Kaneko; K. Kato; S. Kawabata; T. Kon; M. Kuroda; Y. Kurihara; T. Munehisa; D. Perret-Gallix; Y. Shimizu; H. Tanaka

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\susy23 is a Monte-Carlo package for generating supersymmetric (SUSY) processes at $e^+e^-$ colliders. Twenty-three types of SUSY processes with 2 or 3 final state particles at tree level are included in version 2.0. {\susy23} addresses event simulation requirements at $e^+e^-$ colliders such as LEP. Matrix elements are generated by GRACE with the helicity amplitude method for processes involving massive fermions. The phase space integration of the matrix element gives the total and...

Source: http://arxiv.org/abs/hep-ph/9711283v1

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28

Sep 21, 2013
09/13

by
N. V. Krasnikov; G. Kreyerhoff; R. Rodenberg

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We study the dependence of the Higgs boson mass on the supersymmetry breaking scale in the minimal supersymmetric extension of the standard Weinberg-Salam model. In particular, we find that for supersymmetry breaking scale $10^8$ GeV $\leq M_s \leq 10^{16}$ GeV and for $m^{pole}_{top} = 175 \pm 5 $ GeV the Higgs boson mass is 120 GeV $ \leq m_h \leq 160 $ GeV

Source: http://arxiv.org/abs/hep-ph/9711286v1

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Sep 21, 2013
09/13

by
M. Beth Ruskai; Elisabeth Werner

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The Error Function \begin{eqnarray} V(x) & \equiv & \sqrt{\pi} e^{x^2} [1 - \hbox{erf}(x)] \\ & = & \int_0^\infty \frac{ e^{-u} }{\sqrt{x^2 + u}} du = 2 e^{x^2}\int_x^\infty e^{-t^2} dt \nonumber \end{eqnarray} arises in many contexts, from probability to mathematical physics. We give estimates for the Error Function from above and below which are optimal within a certain class of functions.

Source: http://arxiv.org/abs/math/9711207v1